.banner_div {
  width: 100%;
  height: 7.2rem;
}
.banner_div .banner_img {
  width: 100%;
}
.banner_div .banner_img img {
  width: 100%;
  height: 7.2rem;
}
.banner_div .hd {
  position: absolute;
  width: 19.2rem;
  z-index: 1;
  margin-top: 6.8rem;
}
.banner_div .hd ul {
  text-align: center;
}
.banner_div .hd ul li {
  width: 0.17rem;
  height: 0.17rem;
  border-radius: 50%;
  border: solid 1px #adabaa;
  display: inline-block;
  margin-right: 0.14rem;
}
.banner_div .hd ul .on {
  background-color: #3156a3;
}
